...in the separate parts, if the body bo divided into several distinct portions. * * * * If the body be opposed in its progress by an obstacle of not more...onwards, as in its natural state ; but if the obstacle bo equal to its own height, its progress is arrested, and the cut extremity of the body remains forced...

...avoidance of danger. If the body be opposed in its progress by an object of not more than half its height, it mounts over it, and moves directly onwards,...opposing substance, the legs still continuing to move." HITCHCOCK'S AWATOMY 669. Nervous System of Molluses. — Cephalie Ganglia.— Pedal Ganglia. — Parieto...

...in the separate parts, if the body bo divided into several distinct portions. * * * * If the body be opposed in its progress by an obstacle of not more...up against the opposing substance, the legs still continning to move."* All which facts imply that even in animals of this comparatively-advanced organization,...

...avoidance of danger. If the body be opposed in its progress by an object of not more than half its height, it mounts over it, and moves directly onwards,...remains forced up against the opposing substance, the leys still continuing to move." HITCHCOCK'S ANATOMY 669. Nervons System of Mollnses.— Cephalie Ganglia....

...and show no direction of object, no avoidance of danger. If the body be opposed in its progress by au obstacle of not more than half of its own height,...arrested, and the cut extremity of the body remains forced-up against the opposing substance, the legs still continuing to move. — If, again, the Ventral...

...in the separate parts, if the bedy be divided into several distinct portions. * * * * If the bedy be opposed in its progress by an obstacle of not more...progress is arrested, and the cut extremity of the bedy remains forced up against the opposing substance, the legs still continuing to move."* All which...

...by an obstacle of not more than half its weight, it mounts over it, and moves directly onwards as if in its natural state ; but if the obstacle be equal...body remains forced up against the opposing substance ; but the legs will continue to move. A water-beetle having had its nervous cephalic ganglia removed,...

...or the cut extremity of the nervous cord. The body is moved forward, never backwards. If the body be opposed in its progress by an obstacle of not more than half its weight, it mounts over it, and moves directly onwards as if in its natural state ; but if the obstacle...

...in the separate parts, if the body be divided into several distinct portions. * * * * If the body be opposed in its progress by an obstacle of not more...progress is arrested, and the cut extremity of the body remaina forced up against the opposing substance, the legs still continuing to move."* All which facts...

...as it were "mechanically;" and show no direction of object, no avoidance of danger. If the body be opposed in its progress by an obstacle of not more...obstacle be equal to its own height, its progress ia arrested, and the cut extremity of the body remains forced-up against the opposing substance, tlie...